avformat/hevc: Fix potential leak in case of ff_hevc_annexb2mp4_buf failure
ff_hevc_annexb2mp4_buf() could indicate an error, yet leave cleaning
after itself to the caller, so that a caller could not simply return the
error, but had to free the buffer first.
(Given that all current callers have set filter_ps = 0, this error can
currently not be triggered.)
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@gmail.com>
Signed-off-by: James Almer <jamrial@gmail.com>
(cherry picked from commit
680cd59bb21c7bce92789ff885c018207b0b90bc)
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@gmail.com>